If a purchaser opts for electronic title and registration service, what might a dealer charge?

Answer: A — An additional fee

By opting for electronic title and registration service, the purchaser is granting the dealer permission to process and submit their title and registration electronically, typically through an online platform. This service requires a cost to the dealer, therefore they may charge an additional fee to cover the expenses. The other options are incorrect because they do not accurately reflect the service being provided. A complimentary service means it is free, which is not the case for electronic title and registration. A tax reimbursement would only be applicable if the dealer had already paid the taxes on behalf of the purchaser, which is not the case in this scenario. And a warranty surcharge would be an additional cost for a warranty, which is not related to electronic title and registration. Therefore, option A is the most appropriate and feasible option.